Simple Loading Spinner Tapestry 5 Mixin w/ spin.js

Sharing a small snippet on creating a loading spinner in a Tapestry 5.3+ Mixin, using spin.js.
It creates a convenient way to add spinners to your long-loading-times ajax zone updates, with all the code hidden away from the template .tml and page class object.
Sorry I can’t show a working example, that would entail running a Tapestry application server.
But it’s very straightforward, just grab the spin.min.js and the rest falls into place (it also depends on jQuery).